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Executive Summary
Shilajit is a geological product, meaning it is born in close contact with rock minerals—including Lead and Arsenic. For brands aiming for the US market, this is a lethal risk. This audit explores how Rainwood Biotech’s Low-Temperature Nano-Filtration removes heavy metals at the ionic level, securing your brand's compliance with California's Proposition 65.
The Heavy Metal Burden: Why 'Raw' is Dangerous
Nature does not care about California's Prop 65. Raw Pure Himalayan Shilajit often contains lead (Pb) levels of 5-10 ppm and arsenic levels that would trigger an immediate FDA recall. Traditional 'Cloth Filtration' is useless against these microscopic ions.
Rainwood Biotech utilizes 'Liquid-Phase Nano-Filtration.' We dissolve the Shilajit resin and pass it through a series of selective membranes that act as molecular sieves. These membranes allow the tiny Fulvic Acid molecules and essential minerals to pass while trapping the heavy, toxic ions of Lead, Mercury, and Cadmium. We can consistently drive Lead levels below 0.5 ppm—the 'Gold Standard' for international brands.
By choosing our Shilajit Extract, you are investing in a 'Safe Harbor' for your brand. We provide the ICP-MS proof that your product is a health boost, not a heavy-metal liability.
About Rainwood Biotech
Rainwood Biotech is a strategic manufacturing partner that bridges the gap between molecular purity and market reality. Operating a 10,000 sqm smart-manufacturing base, we specialize in high-precision botanical extraction and engineered delivery systems. Whether your brand demands raw resins or advanced formulation solutions, Rainwood Biotech provides the technical transparency and industrial stability required for global leadership.